Game used football attributed to tight end extraordinaire Rob Gronkowski. Official NFL The Duke (Goodell) ball displays light, if any, use, and has Gronk's number 87 written on the laces in black marker, while another area of writing on the laces has been covered over, also in black marker. Ball is slightly deflated, we are unsure as to whether it still holds air. Gronkowski's immense talent and flamboyant personality - as well as his long-term partnership with Tom Brady - have made his name one that transcends the gridiron as he remains a prominent personality, even after his most recent "retirement."